## Wednesday, July 31, 2013

### Anna University GE2111 / ME15 Engineering Graphics Jan 2013 Question Paper

BE/BTech (First/Second) Semester Exam January 2013 (Regulation 2008)
(Common to all Branches)
Time: 3 hrs
Maximum Marks: 100
Minimum Marks: 35

Note: Answer ALL Questions.

1. a. i) The head lamp reflector of a motor car has a maximum rim diameter of 130 mm and maximum depth of 100 mm. Draw the profile of the reflector and name it. 10 marks
Ans: Draw Parabola using any of the method described in article 5.7.2 to 5.7.4 page 5.15-5.17 ED 2e - Basant Agrawal, TMH.
1. a. ii) Draw the involute of a circle of diameter 40 mm. 10 marks
Ans: Refer problem 6.10 page 6.13 of ED 2e - Basant Agrawal, TMH.
OR
1. b. i) Differentiate first angle projection with third angle.projection. 5 marks
Ans: Refer article 7.7 and 7.9 of ED 2e - Basant Agrawal, TMH.
1. b. ii) Draw the orthographic views for the given isometric views using free hand:
(1) Front view (2) Top view (3) Side view. Mark the dimensions. 15 marks

Ans: Refer problem 7.4 page 7.13 of ED 2e - Basant Agrawal, TMH
2. a i) Draw the projections of the following points on a common reference line.
(1) P, 35 mm behind the VP and 20 mm below the HP
(2) Q, 40 mm infront of the VP and 30 mm above the HP
(3) R, 50 mm behind the VP and 15 mm above the HP
(4) S, 40 mm below the HP and in the VP
(5) T, 30 mm infront of the VP and 50 mm below the HP
10 marks
Ans: Refer problem 8.10 page 8.8 of ED 2e - Basant Agrawal, TMH.

2. a. ii) The end P of a line PQ, 70 mm long is 15 mm above the HP and 20 mm in front of the VP. Its 50 mm long plan is inclined at 45° to the VP. Draw the projections of the line and find its true inclinations with the VP and the HP. 10 marks
Ans: Refer ED 2e - Basant Agrawal, TMH.
OR
2. b) A circular plate of diameter 70 mm has the end P of the diameter PQ in the HP and the plate is inclined at 30° to the HP. Draw its projection  (i) the diameters PQ appears to be inclined at 45° to the VP in the top view. (ii) the diameter PQ makes 45° with the VP. 20 marks
Ans: Refer problem 10.39 page 10.33 of ED 2e - Basant Agrawal, TMH.
3. a) Draw the projections of a hexagonal prism of base side 20 mm and axis length 50 mm when its rests on the ground on one of the edges of the base, and the axis inclined at 35° to the ground and parallel to the VP. 20 marks
Ans: Refer problem 11.9 page 11.14 of ED 2e - Basant Agrawal, TMH.
OR
3. b) A square pyramid of base side 30 mm and height 50 mm rests on the ground on one of its base edges such that its axis is inclined at 45° to the ground and parallel to VP. Draw its projections. 20 marks
Ans: Refer problem 11.11 page 11.15 of ED 2e - Basant Agrawal, TMH.
4. a) A cylinder of diameter 60 mm and height 80 mm has a central hexagonal slot of side 20 mm running right through the length. The cylinder is lying on the HP with its axis perpendicular to the VP. A vertical cutting plane cuts the cylinder in such a way that it meets the bases at 6 mm from diametrically opposite ends. Draw the sectional front view and the true shape of the section. 20 marks
Ans: Refer ED 2e - Basant Agrawal, TMH
OR
4. b) A pentagonal pyramid, side of base 30 mm and height 52 mm, stands with its base on HP and an edge of the base is parallel to VP and nearer to it. It is cut by a plane perpendicular to VP, inclined at 40° to HP and passing through a point on the axis, 32 mm above the base. Draw the sectional top view. Develop the lateral surfaces of the truncated pyramid. 20 marks
Ans: Refer problem 13.21 page 13.21 of ED 2e - Basant Agrawal, TMH.
5. a) A hexagonal prism of base side 20 m.m and height 40 mm has a square hole of side 16 mm at the centre. The axes of the square and hexagonal prism coincide. One of the faces of the square hole is parallel to a face of the hexagonal prism. Draw the isometric projection of the prism with. hole to full scale. 20 marks
Ans: Similar problem 15.24 page 15.21 of ED 2e - Basant Agrawal, TMH.
OR
5. b) Steps provided for an LIG house consist of three treads of 250 mm each and three rises of 150 mm each. The length of the steps is 1000 mm. The steps are parallel to the picture plane. The nearest face of the steps is 500 mm behind the PP. The station point is 2000 mm in front of the PP and 1000 mm above the ground. The station point lies in a central plane 1250 mm to the right of the right extreme face of the steps. Draw the perspective view of the steps. 20 marks

Ans: Refer problem 17.19 page 17.22 of ED 2e - Basant Agrawal, TMH.